Hamed Ahmadi; Vahid Rasoli Marivani; Yousef Mohammadi
Volume 22, Issue 2 , June 2020, , Pages 281-288
Abstract
The goal of this study was to determine regression equations to predict metabolizable energy of wheat samples given their chemical compositions using meta-analytical approach. A database compromising chemical compositions and apparent metabolizable energy corrected for the nitrogen (AMEn) ...
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The goal of this study was to determine regression equations to predict metabolizable energy of wheat samples given their chemical compositions using meta-analytical approach. A database compromising chemical compositions and apparent metabolizable energy corrected for the nitrogen (AMEn) of 111 published sources of wheat strains was used. Sample information contains crude protein (CP), ether extract (EE), crude fiber (CF), ash and AMEn. Average values for AMEn was calculated as 2917.46 (kcal/kg), while for the CP, EE, CF, ash was calculated as 12.53, 2.12, 1.61and 1.56 (% dry matter), respectively. Meta-regression equations for predicting AMEn wheat based on chemical composition were developed and evaluated by means of provided database. Best equation obtained as: AMEn (kcal/kg)=1648+45.8 %CP+175.8 %EE+ 185.4 %CF. This equation can be used for predicting energy of wheat variates in feed-factories and poultry farms.
Pirouz Shakeri; Morteza Rezaie; Seyed Ahmad Mirhadi
Volume 17, Issue 1 , April 2015, , Pages 59-70
Abstract
The present study was conducted to investigate the effects of ensiling pistachio by-product (PBP) on nutrient value, some physical and chemical parameters. Fresh PBP was ensiled into a trench silo for three months and simultaneously amount of PBP was dried in front of the sun. Chemical composition, buffering ...
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The present study was conducted to investigate the effects of ensiling pistachio by-product (PBP) on nutrient value, some physical and chemical parameters. Fresh PBP was ensiled into a trench silo for three months and simultaneously amount of PBP was dried in front of the sun. Chemical composition, buffering capacity, water holding capacity, protein fractionation according to cornell net carbohydrate and protein system (CNCPS), concentration of aflatoxin poison and ruminal and post ruminal degradability was measured for both products. The result showed that pH reduced from 4.73 to 4.12 after ensiling. The ensiled PBP had low aNDFom and water soluble carbohydrates and high phenolic compounds content compared to the sun dried PBP (P<0.05). There was no difference in buffering capacity, water holding capacity, non- protein nitrogen, concentration of aflatoxin and degradability in total gastrointestinal tract between sun-dried and ensiled PBP. Aflatoxin concentration for both PBP was in the permitable range of using in animal nutrition. It was concluded that PBP had a good potential for ensiling and that process of ensiling had no detrimental effect on nutritive value of PBP and furthermore ensiled PBP had a desirable aerobic stability.